Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to H. R. Hewer Esq.; Royal College of Science, South Kensington, S.W.7. Replies to an enquiry informing H. R. Hewer that there would be no objection to his quoting from Hewer's paper on Amphibian Colour Change for his address before the British Association. 13 August 1923